S
M
T
W
T
F
S
30
76°
56°
31
76°
60°
1
79°
61°
2
82°
61°
3
82°
58°
4
76°
59°
5
76°
57°
6
79°
55°
7
76°
54°
8
77°
56°
9
79°
57°
10
81°
59°
11
82°
59°
12
82°
60°
13
83°
59°
14
83°
56°
15
78°
56°
16
78°
59°
17
82°
59°
18
82°
60°
19
83°
57°
20
83°
59°
21
82°
59°
22
79°
55°
23
75°
53°
24
74°
52°
25
74°
51°
26
73°
53°
27
74°
56°
28
76°
53°
29
80°
51°
30
77°
57°
1
75°
57°
2
74°
55°
3
Hist. Avg.
76°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Niles District
Niles District's September 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 51° and 61°. The average high for September is 78° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Niles District. See also: October | November | December.